OAuth/User models refractoring -> use mongoose api

server/models/oauth-client.js

@@ -0,0 +1,33 @@
+const mongoose = require('mongoose')
+
+// ---------------------------------------------------------------------------
+
+const OAuthClientSchema = mongoose.Schema({
+  clientSecret: String,
+  grants: Array,
+  redirectUris: Array
+})
+
+OAuthClientSchema.path('clientSecret').required(true)
+
+OAuthClientSchema.statics = {
+  list: list,
+  loadByIdAndSecret: loadByIdAndSecret,
+  loadFirstClient: loadFirstClient
+}
+
+mongoose.model('OAuthClient', OAuthClientSchema)
+
+// ---------------------------------------------------------------------------
+
+function list (callback) {
+  return this.find(callback)
+}
+
+function loadFirstClient (callback) {
+  return this.findOne({}, callback)
+}
+
+function loadByIdAndSecret (id, clientSecret) {
+  return this.findOne({ _id: id, clientSecret: clientSecret })
+}